A race condition was addressed with additional validation. This issue is fixed in Security Update 2021-005 Catalina. Mounting a maliciously crafted NFS network share may lead to arbitrary code execution with system privileges.
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityHigh
RequirementsPresent
PrivilegesNone
User InteractionActive
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | PoC | E: U→P | 4.8 → 6.6 |
| 2026-07-21 | nvd | AV: P→N, PR: H→N, VC: N→H, VI: N→H, VA: N→H | 0.0 → 4.8 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| apple | mac_os_x | ≥ 10.15, ≤ 10.15.6 |
| apple | mac_os_x | 10.15.7 |
| Apple | Security Update - Catalina | < 2021 |
Published: 2021-10-19
